. Author manuscript; available in PMC: 2012 Dec 1.

Published in final edited form as: Radiother Oncol. 2011 Jun 12;101(3):376–382. doi: 10.1016/j.radonc.2011.05.028

Table 3.

Comparison of the Average Maximum or Mean Doses to Normal Tissues Between IMRT, Adaptive IMRT, IMPT, and Adaptive IMPT

	Spinal Cord	Left Parotid		Right Parotid		Ipsilateral Parotid		Contralateral Parotid		Glottic Larynx	Brain stem	Mandible
	Max^† (Gy)	Mean (Gy)	V20^*	Mean (Gy)	V20^*	Mean (Gy)	V20^*	Mean (Gy)	V20^*	Mean (Gy)	Max^† (Gy)	Max^† (Gy)	V60^*	V70^*
IMRT	42.1	37.8	60.4%	32.0	55.5%	43.1	68.4%	26.8	47.5%	45.4	44.8	75.1	34.2%	15.0%
Adaptive IMRT	41.7	32.8	54.0%	31.6	54.8%	39.0	63.6%	25.3	45.2%	41.8	42.2	73.0	25.3%	6.7%
IMPT	30.5	27.2	47.9%	25.3	45.8%	32.9	54.5%	19.5	39.2%	35.3	31.3	73.8	22.8%	8.9%
Adaptive IMPT	28.4	25.0	43.3%	23.1	43.5%	29.8	51.3%	18.3	35.7%	31.0	29.0	71.1	19.5%	5.2%

^†

Max = average maximum point dose

V20/60/70 = volume receiving 20/60/70 Gy